'Fuel Doctor' tested for fuel-efficiency boost

With gas prices on the rise, who wouldn't want to cut costs? There's a new product that claims to give you increased power and fuel economy. It's called the Fuel Doctor FD-47. Eyewitness News teamed up with Consumer Reports to put it to the test. The Fuel Doctor commercial says the FD-47 "fuel-efficiency booster" creates a more stable current, resulting in increased power and improved fuel economy. Consumer Reports wanted to see just how well the $50 Fuel Doctor FD-47 works.

"It claims to have the best effect on vehicles older than two years," said Consumer Reports tester David Champion. "And also claims to have some effect on vehicles that are newer."

Consumer Reports tested the Fuel Doctor device in 10 different vehicles. Six of the cars were equipped with a highly accurate fuel economy meter. Testers then measured fuel efficiency for both city and highway driving.

The other vehicles were put through acceleration tests to see if the Fuel Doctor device increases power as claimed. Then the tests were repeated without the Fuel Doctor.

So in the end?

"We found it made no significant difference at all. The only thing we saw, the light was on," said Champion.

As you may have figured out by now, Consumer Reports' tests show that the Fuel Doctor does not improve your gas mileage.